Rubbing tight teen pussy

I had just came home from soccer practice and when I walked into the bedroom, I caught my girlfriend lying on the bed naked rubbing her pussy. I was rock hard within seconds. I just stood there and watched her as I stroked my cock. She saw me and invited me to come join her. I held her in my arms, kissing her as I rubbed her moist little pussy. She was so wet and begged me to fuck her hard. The more she begged, the more turned on I became until I gave in to her pleads for my cock.